see also

The 20-minute video — from an ISIS affiliate called the Islamic State in Egypt — features footage of Coptic Pope Tawadros II along with Christian businessmen, judges and priests.

It also shows Mahmoud Shafik Mohamed Mostafa, also known as Abu Abdullah al-Masri, identified as the suicide bomber who struck St. Mark’s Coptic Cathedral in Cairo on Dec. 11, killing 28 people, mainly women and children.

Until Sunday, that attack was the worst in Egypt since the bombing of the Saints Church in Alexandria, also Coptic, early on New Year’s Day 2011, when 21 people were slaughtered.

One of the most notorious massacres of Coptic Christians was memorialized in a gruesome February 2015 ISIS video that shows the beheadings of 21 Egyptian migrants on the shore of Libya.

Following the slayings, a masked killer known as Jihadi John points his knife toward the Mediterranean Sea, vowing: “And we will conquer Rome by Allah’s permission, the promise of our prophet, peace be upon him.”